Buenas noches (Good night) to all hands.

Original specs for B18B indicate 100 RON Octane gas. This is a copy of specs from the 1967 owners manual:


IPD sells a low-compression headgasket for use B18B engines with US gasoline (probably the previously owner or the previous-previously owner rig a similar headgasket on that engine after de arabian petrol crisis).

If I remember right, on US you are using Octane Pump values, it is 3 to 6 less numbers than RON octane equivalent: then 100 RON octane would be 94-97 Pump Octane. I´m sure more experienced owners will be know a more precise equivalence between octane types.

On my rojo B18A engine I use 97 RON like specs stats, if I use the 90 RON gas (the next available gas octane here) then the engine overheat and remain running some seconds after the cut of the ignition (self ignition?).

Btw: Here 1 US gallon of 97 RON octane is sell on 13 soles (US$ 3.82 aprox) and the 90 RON is sell on 11.50 soles (US$ 3,28 aprox)...how crazy are the prices on your local gas station? (I believe peruvian gas prices are pretty high - I´m studing the option of using LPG as a alternate fuel).

Happy volving

Joaquin
Rojo 121 Amazon
Lima Peru